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- Scooter 50-850cc
- Royal Alloy Rear Wheel Bolt for GP, GT, TG, JPS
Genuine Royal Alloy wheel bolt for the rear wheel mounting of various GP, GT, JPS and TG models. The bolt is part of the rear wheel assembly and is a safety-relevant fastening component within the wheel mounting system.
Royal Alloy genuine part number 0308100001-02-001 provides the correct replacement part for repairing the standard rear wheel mounting. The bolt features a cylindrical head with an internal hexagon socket, a tapered transition to the shank and an external thread extending over a large part of the shank.
The wheel bolt features a solid, cylindrical head with an internal hexagon socket. This drive allows the bolt to be tightened and loosened using a suitable Allen key or hex bit.
The tool socket is recessed into the face of the bolt head. This means the external shape of the head remains available for the intended installation position without requiring an external hexagon.
The internal hexagon has six straight contact surfaces through which the torque is transmitted when tightening and loosening the bolt.
A hex tool of the correct size must be used for installation. A tool that does not fit correctly or is not fully inserted can damage the internal surfaces and make subsequent removal of the bolt more difficult.
A characteristic feature of this Royal Alloy wheel bolt is the shape of its head.
The outer section of the head is cylindrical. Towards the thread, the head tapers through a conical section to the significantly narrower bolt shank.
This construction therefore differs from a conventional socket head bolt with a flat underside to the head.
The tapered section forms the transition between the larger head diameter and the threaded shank. The exact contact surface and function of the tapered section are determined by the intended wheel mounting arrangement.
When selecting a replacement bolt, the thread alone is therefore not the only relevant factor. The shape of the bolt head and the transition to the shank must also match the original wheel mounting.
The bolt shank features an external thread with evenly formed thread turns.
The thread extends over a large part of the shank length and terminates at the flat end of the bolt. A short transition section is visible between the beginning of the thread and the tapered head area.
The bolt is made of metal and has a silver-coloured finish.
The product images clearly show the machined thread flanks and the transitions between the bolt head and shank.
The exact thread dimensions, thread pitch, strength class and type of surface treatment cannot be reliably determined from the available information.
For replacement purposes, the Royal Alloy genuine part number should therefore be used rather than selecting the bolt solely on the basis of its external appearance.
The wheel bolt is part of the rear wheel mounting system on various Royal Alloy models.
In Royal Alloy spare parts diagrams, genuine part number 0308100001-02-001 is listed within the front and rear wheel assembly. The component is referred to there as “Coupling Bolt” or “Coupling Bolts”.
The bolt is used in conjunction with the designated wheel mounting and the corresponding fastening components.
As part of the wheel fastening system, it is important for the secure connection of the corresponding components. An undamaged thread, an intact tool socket and correct installation are therefore particularly important.
A bolt with a damaged thread, deformed head or worn internal hexagon socket should not be reused.
The wheel bolt is used on various vehicles from the Royal Alloy GP, GT, JPS and TG model ranges.
Genuine part number 0308100001-02-001 is documented in spare parts diagrams and parts listings for the following models, among others:
The part is also listed for further model variants within these ranges. As wheel mountings and fastening components can differ depending on the vehicle version, compatibility should be checked using the genuine part number before ordering.
Wheel bolts are safety-relevant vehicle fasteners. The vehicle manufacturer's specifications must therefore be observed during installation.
Before installation, both the bolt thread and the corresponding internal thread should be checked for damage, contamination and corrosion.
The bolt should initially screw into the designated thread by hand. Unusually high resistance may indicate damaged threads or incorrect alignment.
A suitable tool must be used for final tightening. The specified tightening torque depends on the technical Royal Alloy specifications for the respective vehicle model.
As no reliably confirmed torque value is available for this bolt, the appropriate value should be taken from the vehicle-specific workshop manual.
Any specifications concerning the use of thread-locking compounds and the reusability of the fastening components must also be observed. The intended installation conditions should not be altered without corresponding manufacturer specifications.
After work on the wheel mounting system, the correct installation of the complete wheel assembly must be checked.
The Royal Alloy wheel bolt with internal hexagon socket is a vehicle-specific fastening component for the rear wheel assembly.
Its distinctive head shape with tapered transition, internal hexagon drive and threaded shank correspond to the construction of the original component.
Royal Alloy genuine part number 0308100001-02-001 allows the required bolt to be clearly identified and specifically replaced during maintenance or repair work.
